Rotary fan.



E. GLANTZBERG. ROTARY PAN; APPLIQATION FILED cm. 1, 190a.

Patented June 15, 1909.

ATTORNEY. I

in STATES PATENT OFFICE.

ERNST GLANTZBERG, OF NEW BRITAIN, CONNECTICUT.

ROTARY FAN.

Specification of Letters Patent.

Patented June V15, 1909.

Application filed October 1, 1908. Serial No. 455,683.

rotary fans, and the object is to produce a desirable and eflicient fan of extremely inexpens ve construction, and one by which fans of different diameters ,may be produced by simple expcdients, as hereinafter more fully explained, without the necessity of different patterns and the production of diiferent members therefrom for certain components of the fan.

The invention consists in the combination and arrangement of parts, and the construction of certain of the parts substantially as hereinafter described in conjunction with the accompanying drawings, and set forth in the claims.

In the drawings,Figure l is a front ele as taken substantially on line 2 2, Fig. l;

Fig. 3 is a perspective view showing a flanged sleeve carried on the rotary shaft of the fan and showing one of the carrying brackets afiixed thereon.

Similar characters of reference indicate corresponding parts in all of theviews.

In the drawings :-A represents the annular outer case of the fan having supporting brackets, a, in the present instance four in number, atregular intervals around it, ex tending beyond its. edge, constructed with its inner end portions 6 bent to lines substantially perpendicular to the axis of the annular case, and having inwardly opening screw threaded sockets 10 therein. The-said brackets have perforated attachment lugs (Z whereby, through means of the bolts f 7 they are detachably inclined on the annular fan. case A.

B represents a ring concentrically related to and within the annular fan case A, the same being provided with outwardly extending hubs 9 having screw threaded sockets 12 radially alined with the screw threaded sockets 10 in the bent extremities of the brackets a; and rod, or pipe sections h it,

in the present instance l in number having threads at'their opposite ends are screw enand the sockets l2 appurtenant to the said ring B. v

0 represents an annular shaft, bearing member concentrically within the ring B, a plurality of screws threading through the ring having centralizing engagements with said shaft bearing member 0; and the fan j shaft 1) is rotatably supported in the bearing member C and has a sleeve F aifixed thereon by one or more set screws j. The

said sleeve is provided with a circular flange G having its facein a plane perpendicular to the shaft aXis,'and located concentrically within the annular fan case A.

A series of'fan carrying brackets L are provided for as many of the fan blades M as are included in the rotary fan; and each of these brackets has inner end portions m, sidewise related, and secured by screws or rivets to the face of said flange G,-each bracket furthermore comprising outer extremities n which are bent or twisted into planes oblique to the flange face, while the fan blades are secured in their properly obliquepositions by screws, bolts or rivets, to and for being supported and carried by the obliquely disposed outwardly extending portions n of the bracket. The said brackets may be rapidly and cheaply produced,- for instance, from pressed steel by being stamped out and struck up to the form described and shown and made with the rivet or bolt holes in appropriate places therein.

In the assemblage of the parts the sections of iron 'pipe' or solid rod, for constituting the bearing supportin member I). may be provided with their enc s screw threaded, one

end of each -being screw engaged in the threaded hub g g of-the ring 1) before the brackets are screw engaged with the other ends of the rod like members h and fastened to the annular case A. For fans of larger or smaller sizes, it is only required to cut off the lengths of pipe hof the proper dimensions and make their ends screw threaded for engagements in the manner described wlth the brackets a and the ring B in whatever separation the latter may be from the former, and-the necessity of making patterns and parts therefrom for important members included in the fan structure is'obviated.

7 I claim 1. In a rotary fan, the combination' w th an, annular outer case having supporting brackets, at intervals around, it, provide with screw threaded sockets therein, of a lit) centralized ring including the fan shaft bearing-support, provided with screw threaded sockets at intervals around it radially alined with the first named sockets, rod or pipe sections having threads at their opposite ends, screw engaged both in the sockets of said b 'ackets and of said ring, and a fan-blade carrying-shaft rotatably mounted in the said bearing support therefor.

2. In a rotary fan, the combination with an annular outer case having supporting brackets, at intervals around it, extending beyond its edge, constructed with inner end portions bent to lines substantially perpendicular to the axis of the annular case and having screw threaded sockets therein, and

means for detachably confining said brackets on the case, of a centralized ring including a tan shaft bearing-support, provided with outwardly opening screw threaded sockets at intervals around it, radially alined with the first named sockets, pipe sections having threads at their opposite ends, screw en gaged both in the sockets of said brackets and of said ring, and a tan-blade carryii'igshatt rotatably mounted in the said bearing support therefor.

It In a rotary tan, in combination, an annular outer casing having supportingbrackets at intervals around it, extending beyond its edge, constructed with inner end portions bent to lines substantially perpendicular to the axis of the annular case and having inwardly opening screw threaded sockets therein, means for detachably confining said brackets on the case, a centralized ring provided with outwardly extending hubs having screw threadedsockets radially ahned with those in the bent extremities o't said brackets, pipe sections having threads at shaft axis, a series of fan blade *arr ving bracketsconsistingof plateshavinginnerend portions sidewise related and secured to the face of said flange and having outer e.\"- treinities in planes oblique to such flange tac: and 'lan blades secured on the obliquely disposed portions of said brackets;

Signed by ine at New Britain, Conn. in presence ot two subscribing witnesses.

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